WO2004087575A1 - Mg2mm’ 06+x, ( m=y, rare earth metal, and m’=sn, sb, zr, hf, and ta) compounds and a method for the production of the same - Google Patents

Mg2mm’ 06+x, ( m=y, rare earth metal, and m’=sn, sb, zr, hf, and ta) compounds and a method for the production of the same Download PDF

Info

Publication number
WO2004087575A1
WO2004087575A1 PCT/IN2003/000131 IN0300131W WO2004087575A1 WO 2004087575 A1 WO2004087575 A1 WO 2004087575A1 IN 0300131 W IN0300131 W IN 0300131W WO 2004087575 A1 WO2004087575 A1 WO 2004087575A1
Authority
WO
WIPO (PCT)
Prior art keywords
formation
phase
tolerated
compositions
formula
Prior art date
Application number
PCT/IN2003/000131
Other languages
English (en)
French (fr)
Inventor
Jose James
Selvaraj Senthikumar
Kallumelthekethil Vasudevan Pillai Oonnikrishnan NAIR
Original Assignee
Council Of Scientific & Industrial Research
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Council Of Scientific & Industrial Research filed Critical Council Of Scientific & Industrial Research
Priority to AU2003262231A priority Critical patent/AU2003262231A1/en
Priority to DE60307905T priority patent/DE60307905T2/de
Priority to CNB038262568A priority patent/CN100348497C/zh
Priority to JP2004570100A priority patent/JP4575171B2/ja
Priority to PCT/IN2003/000131 priority patent/WO2004087575A1/en
Priority to CA2520555A priority patent/CA2520555C/en
Priority to EP03816531A priority patent/EP1608595B1/en
Publication of WO2004087575A1 publication Critical patent/WO2004087575A1/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G19/00—Compounds of tin
    • C01G19/006—Compounds containing, besides tin, two or more other elements, with the exception of oxygen or hydrogen
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G25/00—Compounds of zirconium
    • C01G25/006—Compounds containing, besides zirconium, two or more other elements, with the exception of oxygen or hydrogen
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G30/00—Compounds of antimony
    • C01G30/002—Compounds containing, besides antimony, two or more other elements, with the exception of oxygen or hydrogen
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G35/00—Compounds of tantalum
    • C01G35/006—Compounds containing, besides tantalum, two or more other elements, with the exception of oxygen or hydrogen
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/453—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on zinc, tin, or bismuth oxides or solid solutions thereof with other oxides, e.g. zincates, stannates or bismuthates
    • C04B35/457—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on zinc, tin, or bismuth oxides or solid solutions thereof with other oxides, e.g. zincates, stannates or bismuthates based on tin oxides or stannates
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/48—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on zirconium or hafnium oxides, zirconates, zircon or hafnates
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/495—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on vanadium, niobium, tantalum, molybdenum or tungsten oxides or solid solutions thereof with other oxides, e.g. vanadates, niobates, tantalates, molybdates or tungstates
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
    • C04B35/62605—Treating the starting powders individually or as mixtures
    • C04B35/6261—Milling
    • C04B35/6262—Milling of calcined, sintered clinker or ceramics
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2002/00—Crystal-structural characteristics
    • C01P2002/30—Three-dimensional structures
    • C01P2002/36—Three-dimensional structures pyrochlore-type (A2B2O7)
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2002/00—Crystal-structural characteristics
    • C01P2002/70—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data
    • C01P2002/72—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data by d-values or two theta-values, e.g. as X-ray diagram
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/60—Particles characterised by their size
    • C01P2004/64—Nanometer sized, i.e. from 1-100 nanometer
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/40—Electric properties
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3205—Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3205—Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
    • C04B2235/3206—Magnesium oxides or oxide-forming salts thereof
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3224—Rare earth oxide or oxide forming salts thereof, e.g. scandium oxide
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3224—Rare earth oxide or oxide forming salts thereof, e.g. scandium oxide
    • C04B2235/3227—Lanthanum oxide or oxide-forming salts thereof
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3231—Refractory metal oxides, their mixed metal oxides, or oxide-forming salts thereof
    • C04B2235/3244—Zirconium oxides, zirconates, hafnium oxides, hafnates, or oxide-forming salts thereof
    • C04B2235/3248—Zirconates or hafnates, e.g. zircon
    • C04B2235/3249—Zirconates or hafnates, e.g. zircon containing also titanium oxide or titanates, e.g. lead zirconate titanate (PZT)
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3231—Refractory metal oxides, their mixed metal oxides, or oxide-forming salts thereof
    • C04B2235/3251—Niobium oxides, niobates, tantalum oxides, tantalates, or oxide-forming salts thereof
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3231—Refractory metal oxides, their mixed metal oxides, or oxide-forming salts thereof
    • C04B2235/3251—Niobium oxides, niobates, tantalum oxides, tantalates, or oxide-forming salts thereof
    • C04B2235/3255—Niobates or tantalates, e.g. silver niobate
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3293—Tin oxides, stannates or oxide forming salts thereof, e.g. indium tin oxide [ITO]
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3294—Antimony oxides, antimonates, antimonites or oxide forming salts thereof, indium antimonate
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
    • C04B2235/54—Particle size related information
    • C04B2235/5418—Particle size related information expressed by the size of the particles or aggregates thereof
    • C04B2235/5454—Particle size related information expressed by the size of the particles or aggregates thereof nanometer sized, i.e. below 100 nm
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
    • C04B2235/74—Physical characteristics
    • C04B2235/76—Crystal structural characteristics, e.g. symmetry

Definitions

  • This invention relates to a new group of complex ceramic oxides
  • the complex ceramic powders of the present invention are
  • microwave dielectrics and as co-fired microwave components for electrodes of Fuel cells, as catalyst (solid photocatalysts, oxidation catalysts), as gas monitoring
  • magnesium bearing ceramic oxides reported for possible use in electronic ceramic applications are Sr 2 MgMoO 6 , La 2 MgTiO 6 , Gd 2 MgTiO 6 , Gd 2 MgZrO 6 and La 2 MgGeO 6 , (C D Bradle and V J Fratello, preparation of perovskite oxides for high Tc superconductor substrates; journal of Materials Research, volume-5, Number-10, pages-2160-2164 year 1990;). Most of the above mentioned compounds had a perovskite structure.
  • Pyrochlore structures are the structures with the general formula A 2 B 2 O 7 , where A atoms are 8 coordinated ad B atoms are 6 coordinated with one extra O-atom.
  • a atoms are 8 coordinated ad B atoms are 6 coordinated with one extra O-atom.
  • many pyrochlore compounds with more complicated composition (AA') 2 (BB) 2 O 7 have been synthesized.
  • AA' AA'
  • BB BB 2 O 7
  • the ratio of the ionic radius of the cation at the A site to that at the B site must be between 1.46 and 1.80 and (2) the chemical valencies of the various ions must made the compound neutral.
  • pyrochlore compounds exhibit high Ionic conductivity and can be used as electrodes for Fuel cells, egs, Gd 2 TiMoO 7+x ; Gd 2 TiO 7+x (P Holtappels, F W Poulsen and M Mogensen; Electrical conductivities and chemical stabilities of mixed conducting pyrochlores for Solid oxide fuel cell applications; Solid State Ionics, vol. 135, pp 675-679 (2000)).
  • Pyrochlore oxides also exhibit catalytic properties and are used as solid photocatalysts (eg.
  • Pyrochlores have been used in active and passive electronic applications. They are recently recognized as potential candidates for temperature stable, low loss, high permitivity dielectric applications and in temperature stable and temperature compensating dielectrics; microwave dielectrics and as co-fired microwave components (P Holtappels, F W Poulsen and M Mogensen; Electrical conductivities and chemical stabilities of mixed conducting pyrochlores for SOFC applications,; Solid State Ionics, vol. 135, pp 675-679 (2000)).
  • the main objectives of the present invention is to provide a novel Magnesium based class of complex ceramic oxides, that could be used (i) for active and passive electronic applications, (ii) for temperature stable, low loss, high permitivity dielectric applications (iii) for temperature stable and temperature compensating dielectrics; microwave dielectrics and as co-fired microwave components (iv) for electrodes for Fuel cells (v) as catalyst (solid photocatalysts, oxidation catalysts) (vi) as gas monitoring sensors, (vii) as possible host for radioactive wastes, and (viii) as host for fluorescence centers.
  • Yet another objective of the present invention is to provide a method for the preparation of a novel magnesium bearing class of complex ceramic oxides having the above formula, structure and uses.
  • the compounds employed in step (i) may be selected from their oxides, carbonates, chlorides, alkoxides, nitrates, sulphates etc; preferably the salts used are selected from oxides or carbonates.
  • the mixture obtained in step (i) may be ball milled or mixed with wetting medium.
  • the wetting medium may be water, alcohol, acetone or any other organic solvent.
  • the resultant ball milled slurry may be dried to remove the liquid and obtain dry powder.
  • the complex ceramic powders of the present invention are useful as the complex ceramic powders of the present invention.
  • step (ii) the mixture obtained in step (i) is ball milled or mixed with a wetting medium
  • the resultant ball milled slurry obtained is dried to remove the liquid and obtain dry powder.
  • Heating the resultant mixture to a temperature in the range 1000- 1600°C as required for different duration ranging from 3 hour to 50 hours, either in a single step or by taking out the reactant after few hours of heating, checking for phase formation and heating it again after grinding if necessary, upto a maximum of 5 intermediate grindings may be required.
  • the compounds employed in the process are selected from their oxides, carbonates chlorides, alkoxides, nitrates, sulfates etc. and preferably the salts used are selected from oxides or carbonate.
  • the wetting medium used in the process is selected from water, alcohol, acetone or any other organic solvent.
  • novel compound obtained is of the formula Mg 2 SmTaO 6 as nanoparticle having pyrochlore structure wherein minor variation in the compositions upto 8% in any of the metal ions is tolerated for the formation of the phase.
  • novel compound obtained is of the formula Mg 2 NdTaO 6 as nanoparticle having pyrochlore structure wherein minor variation in the compositions upto 8% in any of the metal ions is tolerated for the formation of the phase.
  • novel compound obtained is of the formula Mg 2 DyTaO 6 as nanoparticle having pyrochlore structure wherein minor variation in the compositions upto 8% in any of the metal ions is tolerated for the formation of the phase.
  • novel compound obtained is of the formula Mg 2 PrTaO 6 as nanoparticle having pyrochlore structure wherein minor variation in the compositions upto 8% in any of the metal ions is tolerated for the formation of the phase.
  • novel compound obtained is of the formula Mg 2 GdTaO 6 as nanoparticle having pyrochlore structure wherein minor variation in the compositions upto 8% in any of the metal ions is tolerated for the formation of the phase.
  • novel compound obtained is for the formula Mg 2 EuTaO 6 as nanoparticle having pyrochlore structure wherein minor variation in the compositions upto 8% in any of the metal ions is tolerated for the formation of the phase.
  • novel compound obtained is of the formula Mg 2 LaTaO 6 as nanoparticle having pyrochlore structure wherein minor variation in the compositions upto 8% in any of the metal ions is tolerated for the formation of the phase.
  • novel compound obtained is of the formula Mg 2 DySbO 6 as nanoparticle having pyrochlore structure wherein minor variation in the compositions upto 8% in any of the metal ions is tolerated for the formation of the phase.
  • novel compound obtained is of the formula Mg 2 SmZrO 5 5 as nanoparticle having pyrochlore structure wherein minor variation in the compositions upto 8% in any of the metal ions is tolerated for the formation of the phase.
  • novel compound obtained is of the formula Mg 2 NdZrO 5 . 5 as nanoparticle having pyrochlore structure wherein minor variation in the compositions upto 8% in any of the metal ions is tolerated for the formation of the phase.
  • novel compound obtained is of the formula Mg 2 DyZrO 5 5 as nanoparticle having pyrochlore structure wherein minor variation in the compositions upto 8% in any of the metal ions is tolerated for the formation of the phase.
  • novel compound obtained is of the formula Mg 2 LaSnO 5 5 as nanoparticle having pyrochlore structure wherein minor variation in the composition upto 8% in any of the metal ions is tolerated for the formation of the phase.
  • novel compound obtained is of the formula Mg 2 GdZrO 5 5 as nanoparticle having pyrochlore structure wherein minor variation in the compositions upto 8% in any of the metal ions is tolerated for the formation of the phase.
  • novel compound obtained is of the formula Mg 2 EuZrO 5 5 as nanoparticle having pyrochlore structure wherein minor variation in the compositions upto 8% in any of the metal ions is tolerated for the formation of the phase.
  • novel compound obtained is of the formula Mg 2 LaZrO 5 5 as nanoparticle having pyrochlore structure wherein minor variation in the compositions upto 8% in any of the metal ions is tolerated for the formation of the phase.
  • novel compound obtained is of the formula Mg 2 PrZrO 5 5 as nanoparticle having pyrochlore structure wherein minor variation in the compositions upto 8% in any of the metal ions is tolerated for the formation of the phase.
  • Example-1 Magnesium Samarium Tantalate (Mg 2 SmTaQ 6 ), Magnesium Samarium Tantalate (Mg 2 SmTaO 6 ), for example, is obtained by:
  • Example-2 Magnesium Lanthanum Stanate (Mg 2 LaSn0 5 . 5 ), Magnesium Lanthanum Stanate (Mg 2 LaSnO 5 5 ), for example, is obtained by;
  • Example-3 Magnesium Dysprosium Antimonate (Mg 2 DySb0 6 ),
  • Magnesium Dysprosium Antimonate (Mg 2 DySbO 6 ), for example, is obtained by;
  • Example-4 Magnesium Neodymium Zirconate (Mg2NdZrO6),
  • Magnesium Neodymium Zirconate (Mg2NdZrO6), for example, is obtained by; (i) taking four gram molecular weight of Magnesium Carbonate (MgCO 3 ), one gram molecular weight of Neodymium oxide (Nd 2 O 3 ), and one gram molecular weight of Zirconium oxide (ZrO 2 ).

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Ceramic Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Structural Engineering (AREA)
  • Composite Materials (AREA)
  • Nanotechnology (AREA)
  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Inorganic Compounds Of Heavy Metals (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
PCT/IN2003/000131 2003-03-31 2003-03-31 Mg2mm’ 06+x, ( m=y, rare earth metal, and m’=sn, sb, zr, hf, and ta) compounds and a method for the production of the same WO2004087575A1 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
AU2003262231A AU2003262231A1 (en) 2003-03-31 2003-03-31 Mg2mm' 06+x, ( m=y, rare earth metal, and m'=sn, sb, zr, hf, and ta) compounds and a method for the production of the same
DE60307905T DE60307905T2 (de) 2003-03-31 2003-03-31 Mg2mm' 06+x, ( m=y, seltenes erdmetall und m'=sn, sb, zr, hf und ta)-verbindungen und zugehöriges herstellungsverfahren
CNB038262568A CN100348497C (zh) 2003-03-31 2003-03-31 MG2MM＇O6+x(M=Y,稀土金属；M＇=SN,SB,ZR,HF和TA)化合物及其制备方法
JP2004570100A JP4575171B2 (ja) 2003-03-31 2003-03-31 Ｍｇ２ＭＭ’Ｏ６＋ｘ、（Ｍ＝Ｙ、希土類金属、およびＭ’＝ＳＮ、ＳＢ、ＺＲ、ＨＦ、およびＴＡ）化合物、およびその製造方法
PCT/IN2003/000131 WO2004087575A1 (en) 2003-03-31 2003-03-31 Mg2mm’ 06+x, ( m=y, rare earth metal, and m’=sn, sb, zr, hf, and ta) compounds and a method for the production of the same
CA2520555A CA2520555C (en) 2003-03-31 2003-03-31 Mg2mm' 06+x, ( m=y, rare earth metal, and m'=sn, sb, zr, hf, and ta) compounds and a method for the production of the same
EP03816531A EP1608595B1 (en) 2003-03-31 2003-03-31 Mg2mm' 06+x, ( m=y, rare earth metal, and m'=sn, sb, zr, hf, and ta) compounds and a method for the production of the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/IN2003/000131 WO2004087575A1 (en) 2003-03-31 2003-03-31 Mg2mm’ 06+x, ( m=y, rare earth metal, and m’=sn, sb, zr, hf, and ta) compounds and a method for the production of the same

Publications (1)

Publication Number Publication Date
WO2004087575A1 true WO2004087575A1 (en) 2004-10-14

Family

ID=33104980

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IN2003/000131 WO2004087575A1 (en) 2003-03-31 2003-03-31 Mg2mm’ 06+x, ( m=y, rare earth metal, and m’=sn, sb, zr, hf, and ta) compounds and a method for the production of the same

Country Status (7)

Country Link
EP (1) EP1608595B1 (zh)
JP (1) JP4575171B2 (zh)
CN (1) CN100348497C (zh)
AU (1) AU2003262231A1 (zh)
CA (1) CA2520555C (zh)
DE (1) DE60307905T2 (zh)
WO (1) WO2004087575A1 (zh)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102942928A (zh) * 2012-11-30 2013-02-27 苏州大学 一种锆酸盐基红色荧光粉、制备方法及应用
WO2016185042A1 (de) * 2015-05-20 2016-11-24 H1 Energy B.V. Photokatalysator

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012105583A1 (en) * 2011-01-31 2012-08-09 Canon Kabushiki Kaisha Composition for optical members and optical member
WO2012105584A1 (en) * 2011-01-31 2012-08-09 Canon Kabushiki Kaisha Composition for optical members and optical member
CN102191048B (zh) * 2011-03-18 2013-08-14 中国科学院上海光学精密机械研究所 铕激活的发光二极管用红色荧光粉及其制备方法
WO2015004529A2 (en) * 2013-07-11 2015-01-15 Sabic Global Technologies B.V. Method of making pyrochlores
CN107986785B (zh) * 2017-12-09 2020-11-24 桂林理工大学 高品质因数微波介电陶瓷材料及其制备方法
CN111410514B (zh) * 2020-03-31 2021-01-05 青海大学 一种光学测温材料及其制备方法和非接触式测温材料

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020110517A1 (en) * 2000-03-28 2002-08-15 Council Of Scientific And Industrial Research Single step process for the synthesis of nanoparticles of ceramic oxide powders

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04175223A (ja) * 1990-11-06 1992-06-23 Sumitomo Metal Mining Co Ltd 多成分系複合ペロブスカイト固溶体の製造方法
JPH05254841A (ja) * 1992-03-12 1993-10-05 Sumitomo Sitix Corp 酸化物粉末の製造方法
JP3401834B2 (ja) * 1993-04-27 2003-04-28 ソニー株式会社 誘電体材料
JPH0733441A (ja) * 1993-07-26 1995-02-03 Nippon Steel Corp 複合酸化物の製造方法
CN1089249A (zh) * 1993-11-15 1994-07-13 天津大学 抗高温老化及高韧性psz陶瓷
JP2001073142A (ja) * 1999-09-02 2001-03-21 Internatl Superconductivity Technology Center 複合ペロブスカイト酸化物（例えばａ３＋２ｂ＋ｂ５＋ｏ６，ａ２＋２ｂ３＋ｂ５＋ｏ６，ａ２＋３ｂ２＋ｂ５＋２ｏ９等）の薄膜の原料とその成長法

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020110517A1 (en) * 2000-03-28 2002-08-15 Council Of Scientific And Industrial Research Single step process for the synthesis of nanoparticles of ceramic oxide powders

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
ASHA M. JOHN ET AL.: "Synthesis and rapid densification of nanoparticles of barium praseodymium hafnium oxide: a new complex perovskite", JOURNAL OF NANOPARTICLE RESEARCH, vol. 3, 2001, pages 413 - 417, XP009025406 *
J. KOSHY ET AL.: "Rare Earth Barium Stannates: Synthesis, Characterization, and Potential Use as Substrates for YBa2Cu3O7-delta Superconductor", J. AM. CERAM. SOC., vol. 78, no. 11, 1995, pages 3088 - 3092, XP001179275 *
WARIAR P R S ET AL: "Development of superconducting YBa2Cu3O7 - delta and YBa2Cu3O7 - delta-Ag thick film by dip coating on SmBa2SbO6, a new ceramic substrate material", APPLIED SUPERCONDUCTIVITY, PERGAMON PRESS, EXETER, GB, vol. 4, no. 1, 1996, pages 111 - 117, XP004008880, ISSN: 0964-1807 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102942928A (zh) * 2012-11-30 2013-02-27 苏州大学 一种锆酸盐基红色荧光粉、制备方法及应用
WO2016185042A1 (de) * 2015-05-20 2016-11-24 H1 Energy B.V. Photokatalysator

Also Published As

Publication number Publication date
CA2520555C (en) 2012-01-03
JP4575171B2 (ja) 2010-11-04
CN1759067A (zh) 2006-04-12
DE60307905T2 (de) 2007-10-11
CN100348497C (zh) 2007-11-14
JP2006514911A (ja) 2006-05-18
DE60307905D1 (de) 2006-10-05
CA2520555A1 (en) 2004-10-14
EP1608595A1 (en) 2005-12-28
AU2003262231A1 (en) 2004-10-25
EP1608595B1 (en) 2006-08-23

Similar Documents

Publication Publication Date Title
Assirey Perovskite synthesis, properties and their related biochemical and industrial application
Boivin et al. Recent material developments in fast oxide ion conductors
Chu et al. Preparation of High‐Tc Superconducting Oxides by the Amorphous Citrate Process
EP1777205B1 (en) Method for producing perovskite complex oxide
Hashimoto et al. Structural, thermal and electrical properties of Ce-doped SrMnO 3
KR20080010737A (ko) 고체산화물 연료전지 전해질용 입방정 스칸디아 안정화지르코니아와 그 제조 방법
Itoh et al. High-and low-spin transition of Ru 4+ in the perovskite-related layered system Sr n+ 1 Ru n O 3 n+ 1 (n= 1, 2, and∞) with the change in n
EP1608595B1 (en) Mg2mm' 06+x, ( m=y, rare earth metal, and m'=sn, sb, zr, hf, and ta) compounds and a method for the production of the same
US7347983B2 (en) Mg2MM'o 6+x, (M=Y, rare earth metal and M'=SN, OR Zr) dielectric ceramics
Kumar et al. Influence of La doping on structure, AC conductivity and impedance spectroscopy of Ba2SnO4 Ruddlesden Popper oxide
Ecija et al. Synthetic methods for perovskite materials; structure and morphology
Salimkhani et al. A glance at the influence of different dopant elements on Li 7 La 3 Zr 2 O 12 garnets
Shukla Structural and impedance spectroscopy study of Mn1. 5Y1. 5CSr1. 5Ba1. 5 antiperovskite
Kumar et al. Sr2SnO4 ruddlesden popper oxide: future material for renewable energy applications
Hungria et al. Sr3Ti2O7 Ruddlesden− Popper Phase Synthesis by Milling Routes
WO1989012027A1 (en) Metal oxide ceramic powders and thin films and methods of making same
Cherepanov et al. Phase equilibria in the La–Ba–Co–O system
CN1384079A (zh) 一种锂钛共掺杂氧化镍基陶瓷的制备方法及其应用
Zhang et al. Preparation method investigation and structure identification by XRD and Raman techniques for A2B2O7 composite oxides
Sodhiya et al. Study of transport and structural properties of garnet structured Ce3+ doped Li7La3Zr2O12 electrolyte by solid state reaction method
Zhuang et al. Ionic conductivity enhancement of La2Mo2− xWxO9 nanocrystalline films deposited on alumina substrates by the sol–gel method
Parkash et al. Preparation structure and dielectric behaviour of the system Sr 1− x La x Ti 1− x Fe x O 3 (x≤ 0.50)
Lajavardi et al. Time‐Resolved High and Low Temperature Phase Transitions of the Nanocrystalline Cubic Phase in the Y2O3‐ZrO2 and Fe2O3‐ZrO2 System
Kong et al. Processing and electrical conductivity property of lithium-doped high-entropy pyrochlore and perovskite ceramics
Wei et al. Extremely enhanced thermal stability of Y2/3Cu3Ti4O12 ceramics by a Pechini method

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NO NZ OM PH PL PT RO RU SC SD SE SG SK SL TJ TM TN TR TT TZ UA UG UZ VC VN YU ZA ZM ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LU MC NL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG

WWE Wipo information: entry into national phase

Ref document number: 3245/DELNP/2004

Country of ref document: IN

121 Ep: the epo has been informed by wipo that ep was designated in this application
DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
WWE Wipo information: entry into national phase

Ref document number: 2003816531

Country of ref document: EP

Ref document number: 2520555

Country of ref document: CA

WWE Wipo information: entry into national phase

Ref document number: 2004570100

Country of ref document: JP

Ref document number: 20038262568

Country of ref document: CN

WWP Wipo information: published in national office

Ref document number: 2003816531

Country of ref document: EP

WWG Wipo information: grant in national office

Ref document number: 2003816531

Country of ref document: EP